/*
 * Copyright (C) 2006 Apple Computer, Inc.
 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef SKY_ENGINE_CORE_RENDERING_HITTESTLOCATION_H_
#define SKY_ENGINE_CORE_RENDERING_HITTESTLOCATION_H_

#include "flutter/sky/engine/platform/geometry/FloatQuad.h"
#include "flutter/sky/engine/platform/geometry/FloatRect.h"
#include "flutter/sky/engine/platform/geometry/LayoutRect.h"
#include "flutter/sky/engine/platform/geometry/RoundedRect.h"
#include "flutter/sky/engine/wtf/Forward.h"
#include "flutter/sky/engine/wtf/ListHashSet.h"
#include "flutter/sky/engine/wtf/OwnPtr.h"
#include "flutter/sky/engine/wtf/RefPtr.h"

namespace blink {

class HitTestLocation {
 public:
  HitTestLocation();
  HitTestLocation(const LayoutPoint&);
  HitTestLocation(const FloatPoint&);
  HitTestLocation(const FloatPoint&, const FloatQuad&);
  // Pass non-zero padding values to perform a rect-based hit test.
  HitTestLocation(const LayoutPoint& centerPoint,
                  unsigned topPadding,
                  unsigned rightPadding,
                  unsigned bottomPadding,
                  unsigned leftPadding);
  HitTestLocation(const HitTestLocation&, const LayoutSize& offset);
  HitTestLocation(const HitTestLocation&);
  ~HitTestLocation();
  HitTestLocation& operator=(const HitTestLocation&);

  const LayoutPoint& point() const { return m_point; }
  IntPoint roundedPoint() const { return roundedIntPoint(m_point); }

  // Rect-based hit test related methods.
  bool isRectBasedTest() const { return m_isRectBased; }
  bool isRectilinear() const { return m_isRectilinear; }
  IntRect boundingBox() const { return m_boundingBox; }

  static IntRect rectForPoint(const LayoutPoint&,
                              unsigned topPadding,
                              unsigned rightPadding,
                              unsigned bottomPadding,
                              unsigned leftPadding);
  int topPadding() const { return roundedPoint().y() - m_boundingBox.y(); }
  int rightPadding() const {
    return m_boundingBox.maxX() - roundedPoint().x() - 1;
  }
  int bottomPadding() const {
    return m_boundingBox.maxY() - roundedPoint().y() - 1;
  }
  int leftPadding() const { return roundedPoint().x() - m_boundingBox.x(); }

  bool intersects(const LayoutRect&) const;
  bool intersects(const FloatRect&) const;
  bool intersects(const RoundedRect&) const;
  bool containsPoint(const FloatPoint&) const;

  const FloatPoint& transformedPoint() const { return m_transformedPoint; }
  const FloatQuad& transformedRect() const { return m_transformedRect; }

 private:
  template <typename RectType>
  bool intersectsRect(const RectType&) const;
  void move(const LayoutSize& offset);

  // This is cached forms of the more accurate point and area below.
  LayoutPoint m_point;
  IntRect m_boundingBox;

  FloatPoint m_transformedPoint;
  FloatQuad m_transformedRect;

  bool m_isRectBased;
  bool m_isRectilinear;
};

}  // namespace blink

#endif  // SKY_ENGINE_CORE_RENDERING_HITTESTLOCATION_H_
